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Man's version of cleavage. Male cleavage.
Jim, the sexy librarian, showed a lot of meavage.
Someone who blindly follows the so called metagame, or short: meta of an online multiplayer game. Metafags are the whiny types who complain that you take or use a currently unpopular weapon / strategy or character. The annoying thing about this attitude is, that the meta is being developed by high level professional players, and is thus not as significant for casual players who play the game recreationally and just want to have fun and play the game like they please.
While playing overwatch:

Player1: I will play Soldier.
Player2: No! You musst pick McCree Soldier is not in the current meta!
Player1: Dude, don't be a metafag!
metafag by Kampfzwiebal December 30, 2016
male cleavage, usually presented via low cut tops from most of the gay community.
look at that guy mincing over there... I wish I had meavage like his
Meavage by Thommo the legend August 30, 2010

metavaguebooking 

Setting a facebook status that describes a generic class of vaguebooking. Intended to highlight the absurdity and annoyance of vaguebooking. Metavaguebooking has yet to be proven effective at limiting the prevalence of vaguebooking within any particular social sphere. A limitation of its effectiveness is the general cluelessness of vaguebookers.
Facebook status updates:
Lila M: obscure song lyric that only a few will get leaving others to wonder why I'm so moody. emoticon.
David S: Nice metavaguebooking!
Man-cleavage, usually formed by prominent pectoral muscles. Not to be confused with man-boobs.
When she came in from the cold, she warmed her hands in my meavage.

She gets all hot and bothered when I flash my meavage.
meavage by Jezz_Torrent April 12, 2007

metavegetarian 

A person or animal that eats animals that are vegetarian.
I'm not a vegetarian, I'm a metavegetarian.